Overflow-gate.



PATENTED MAY 12, 1908.

H. W. BLAISDBLL.

OVERFLOW GATE.

APPLICATION FILED DEC. 6. 1906.

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HIRAM WHEELER BLAISDELL, OF LOS ANGELES, CALIFORNIA.

OVERFLOW-GATE Specification of Letters Patent.

Patented May 12, 1908.

Application filed December 6, 1906. Serial No. 346,568.

To all whom it may concern:

Be it known that I, HIRAM WV. BLAISDELL, a citizen of the United Statesof America, rcsiding at Los Angeles, county of Los Angclcs, State ofCalifornia, have invented a certain new and useful Overflow-Gate; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to hydro-metallurgical apparatus and moreparticularly to slime gates used on collecting vats.

It is designed to provide an apparatus of this character that shall notobstruct the interior of the vat and yet, at the same time shall beaccessible for repairs or other purposes.

In the perspective drawing accompanying, and forming part of, thisspecification, reference numeral 1 designates the side wall of acollecting tank such as are commonly used in hydro-metallurgicalprocesses, having openings 2 cut therein, the portions of wall be tweensaid openings being reinforced by strips 3 riveted thereto, said stripsbeing preferably equal in section to the portion of tank cut away toform the apertures 2.

At each side of openings 2 Z-bars 4 have riveted to them the .flanges of2-bars 6, the latter being disposed, however, so as to lift a portion ofthe said outer flange of Z-bar 4 projecting beyond the web of Z-bar 6 asshown at the upper part of the drawing.

A grid formed of vertical bars 7 hold together by bolts 8, spaced apartby collars 9 on said bolts 8, occupies the space between the rearflanges of Zbars4,being held against said flanges by brackets 10, onlyone of which is shown, which engage outer collars on bolts 8.

A clamp plate 11 held down by bolts 12, holds the lower end of curtain13 to the casting 5. The upper end of said curtain is rolled upon aroller 14, the ends of which have grooves 15, around which loops 16 of iI l The mode of' operation of this device is as follows: The curtain 13having been lowered to the bottom of the vat, sand containing slimcs isdistributed in the vat by any suitable mcchanism. The hcavicr particlessettle on the bottom of the vat and. the water having the slimcssuspended thcrcin flows over the top of the curtain 13 between the bars9 of the grid and down through the space between Z-bars 6 to a conduitprovided to carry it to any desired place. As the sand rises in thetank, by means of ropcs 17 curtain 13 is raised, thereby preventing thesand from escaping with the slimcs.

I claim:

1. An overflow gate comprising a chamber formed on the outcr sidc of thewall of' a vat, openings from said vat to said chamber, a grid dividingsaid chamber and means to close the openings in said grid.

2. An overflow gate comprising a chamber formed on the outcrsidc of thewall of a vat, openings from said vat into said chamber, devices in thesides of said chamber for reniovablv holding a grid, :1 grid heldtherein, a curtain. to close thc openings in said grid and means tooperate said curtain.

3. An overflow gate comprising a chamber formed on the outer side of thewall of a vat, openings from said vat to said chamber, a grid dividingsaid chamber and a curtain to close the apertures in said grid.

1. An overflow gate comprising a chamber formed on the outer side of thewall of a vat, openings from said vat to said chamber, a grid dividingsaid chamber, means to close the openings in said grid, and an openingin the lower part of said chamber on the side of the grid remote fromthe tank.

5. An overflow gatc comprising a chamber formed on the outer side of thewall of a vat, openings from said vat into said chamber, a grid dividingsaid chamber, a curtain against said grid and attached at the bottom tothe floor of said chamber, a. roller attached to the top of the curtainand ropes to lift said roller.

In testimony whereof, l: have signed my name to this specification inthe presence of two subscribing witnesses at Los Angclcs, county of LosAngcles, California, this 16th day of November, A. l). 1906.

lllltAM \YHEllldlll BIIAISDEIAIM \Vitnesscs:

E. IlAS'fY, (I). OI MOREYNOLDS.

